18230243 has 4 divisors (see below), whose sum is σ = 18242280. Its totient is φ = 18218208.

The previous prime is 18230227. The next prime is 18230249. The reversal of 18230243 is 34203281.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18230243 - 2⁴ = 18230227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18230249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353 + ... + 6906.

It is an arithmetic number, because the mean of its divisors is an integer number (4560570).

Almost surely, 2^18230243 is an apocalyptic number.

18230243 is a deficient number, since it is larger than the sum of its proper divisors (12037).

18230243 is a wasteful number, since it uses less digits than its factorization.

18230243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12036.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 18230243 is about 4269.6888645427. The cubic root of 18230243 is about 263.1868296163.

The spelling of 18230243 in words is "eighteen million, two hundred thirty thousand, two hundred forty-three".